Roll-grinding machine.



PATENTED JULY 23, 1907. I. L. BROWN & I. W. SPRINK.

ROLL GRINDING MACHINE.

APPLICATION FILED MAB. 7. 1908.

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No. 861,016. PATENTED JULY 23, 1907.

v'I'. L. BROWN & I. W. SPRINK.

ROLL GRINDING MACHINE..

APPLICATION FILED MAB. 7, v1906.

2 SHEETS-SHEET 2.

gmmy/PM /SAAO w. SPR/NK` @1 /LAN da( m11 @0W Um TED STATES PATENToEEIcE.

FREDERICK L. BROWN AND ISAAC W. SPRINK, OF SCOTTDALE, PENNSYLVANIA.

ROLL-GRINDING MACHINE.

Specification of Letters Patent.

Patented Ju1y'23, 190'?.

Application ned March '1, 1906. Serial No. 304,797.

To all l'whom 'it may concern:

Be it known that we, FREDERICK L. BROWN and ISAAC W. SPRINK, citizens ofthe United States, residing at Scottdale, in the county of Westmorelandand State of Pennsylvania, have invented certain new and .usefulImprovements in Roll-Grinding Machines, of

which the following is a specification.

This invention relates to that type of roll'grinding machines designedfor turning or dressing surfaces on mill rolls used in steel or othermanufacturing plants.

To this end the present invention contemplates a. simple and practicalconstruction of roll grinding machine embodying means for quickly andaccurately grinding straight, concave, convex, or corrugated surfaces onmill and similar rolls. I

One of the distinctive objects of the invention is to produce a type ofroll grinding machine, exceedingly simple in its construction andaction, while at the same time providing a rigid and powerfulconstruction well adapted for heavy and accurate work, while at the sametime involving a novel arrangement of parts which may be utilized as anattachment to the present roll turning lathes, or can be arranged as acomplete selfcontained roll grinding machine capable of performing allof the necessary functions of a machine of that character.

A further object of the invention is to provide a roll grinding machinewherein all chatter is obviated by reason of arranging the grindingwheel in a rigid fixture which compels the same to travel in a lineparallel with the axis of the roll being ground. Alsoithe improvedmachine provides a novel and practical arrangement of pattern-templetwhich can be quickly andaccurately adjusted without the necessity ofsubsequent readjust- `ment (or cut and try after grinding has commenced,

thereby securing quicker results and consequently. a cheaper operation.

With thesel and other objects in view which will more readily appear asthe nature of the invention` is` better understood, the same consists inthe novel con-4 struction, combination, and'arrangement of parts4hereinafter more fully described, illustrated and claimed.

The essential features of the invention involved in carrying ont theobjects above specified are necessarily susceptible to structural changewithout departing from the scope thereof, but a preferred embodiment lofthe invention is shown in the accompanying drawings, in which,

Figure 1 is a top plan view of a roll grinding machine embodying thepresent invention. Fig. 2 is an end view thereof. Fig. 3 is a detailcross sectional view on the line 3-3 of Fig. 2, showing more plainly therelativo relation of the plurality of slides; Fig. 4 is a detailelevation of one ond portion of the pattern sup# porting bracket.

Like references designate corresponding parts in the several figures ofthe drawings.

In carrying vout the present invention, the roll grinding machine, inits adaptation as an attachment for roll turning lathes and as acomplete self-turning machine, includes in its general organization astationary machine bed 1 constituting a supporting base member for theoperative parts of the grinding mechanism.

In the adaptation of the invention shown in the drawings, the same isillustrated as a complete machine embodying all of the necessary partsto effect a dressing of roll surfaces, whether straight, concave,convex, or corrugated. In this illustrated construction, said stationarybed is preferably of a general rectangular form and of sufficient lengthto accommodate a wide range of play for the traveling tooll carriage 2which is arranged transversely or crosswise of the bed at the 'top sidethereof and designed to slide longitudinally of such bed in theoperation of grinding or dressing a roll surface.

Any suitable slide connection may be utilized between the tool carriageand its bed 1, but a practical construction is shown in the' drawingsand consists in providing the bed at its upper longitudinal edgeswith'the guiding bevels 3 slidably interlocking with the under-cut slidetongues 4 provided at the opposite end edges of the traveling toolcarriage 2. l

The tool carriage 2 may be fed longitudinally of its supporting bed, andhence longitudinally of the roll R to be ground through the medium ofany suitable and approved feed mechanism, preferably of the automatictype such as is common to lathes and similar machines. It is preferablethat the carriage 2 be equipped with that type of variable automaticfeed which provides a coarse feed for roughing purposes and a finerfeed' for a finishing operation. However, for illustrative purposes, thecarriage feed mechanism is illustrated in outline in the drawings, andas shown, essentially involves a gear bracket 5 pendent from the bottomside of the' carriage 2, and supporting for movement with the carriage atraveling worm 6 splined on a feed shaft 7 arranged longitudinally ofthe machine bed and-driven through any I suitable driving connections.The said traveling worm 6 is shown as meshing with a. Worm wheel 8 on ashort counter shaft 9 journaled on the gear bracket 5 and also Carryinga feeding pinion -lO'meshing with a stationary feed rack 11 fitted toand arranged longitudinally of the machine bed, as plainly shown inFigs. l and 2 of the drawings. v

In addition to sliding longitudinally of the machine bed, the slidingto'ol carriage 2 provides for ,the adjustable support thereon of whatmay be termed a double slide consisting of the separate slide members 12and 13 respectively arranged in superposed relation. The slide member l2is the lowermost one and may be properly referred to as a self-adjustingfollower slide which is arranged in parallel relation to the travelingtool car- .riage and which has the opposite side edges thereof slidablyengaged in the side guide ways 14 provided on the upper side of the tool`carriage at the longitudinal or side edges thereof. This slidableinterlocking relation beween the slide`12 and the tool carriage or slide2 provides for firmly holding these members together for movement inunison longitudinally of the machine bed,

while at the same time permitting an independent lon- A accurate andminute,l adjustment of the tool holding slide 13. through the medium ofan adjusting screw 16. 27 of the templet, 11?.; a radius equal' to theaverage radius of each group of rolls to be ground, and by varythedouble slide 12-13 and the threaded portion of this screw engages a xednut 17 on the tool holding slide 13 and is journaled near its outer endin a fixed bearing This adjusting screw 16 is arranged longitudinallyabove stand 18 fitted on one end portion of the follower slide 12. Atits end next to the bearing stand 18 the adjusting Screw 16 is equippedWithhand Wheel 19 Which-Cim be the follower slide 12 has mounted in oron one end conveniently reached and manipulated for purposes of theadjustment referred to.

Contiguous to one side of the machine bed the adjustable tool holdingslide is equipped with an upstanding bearing hanger consisting of a pairof spaced standards 20 provided at their upper ends with the bearingboxes 21 in which are journaled the spindle ends of thewheel shaft 22carrying a grinding wheel 23 and a belt pulley 24 over which passes adriving belt 25 for imparting motion to the wheel. The said grindingwheel 23 is of the type usually employed for roll grinding purposes, andin carrying out the present invention it is intended that this wheelshall have a grinding surface corresponding gto the character of thesurface being ground on the roll,

thus insuring a perfect wheel-bearing on the face of the roll.

A distinctive feature of the present inventionresides in the' coperativerelation between the double slide 12-13 and a pattern-templet 26vertically disposed with reference to its inner pattern surface 27 andarranged longitudinally of the machine in substantial parallelism to themachine bed and to the longitudinal axis of the roll complishing theadjustment thereof, the preferred construction is shown in the drawingsand consists in arranging the templet or templet balr at and against they inner side of the .vertical fiange 27 of an angle pattern supportingbracket 28 whose lower or horizontal flange 29 is arranged upon ahorizontal at rest base 30 formed at the outer ends of a pair orplurality of offstanding b1acket arms 31 bolted or otherwise secured toone side of .the machine bed and projecting off therefrom to asufficient distance for holding'the bracket 28 in its odset parallelrelation with referencev to one side of the machine bed, and withreference to one end of the tool carriage slidably arranged thereon tosecure proper rigidity and alinement of parts. The lower horizontal ange29 of the bracket 28 is provided-with a retaining rib or tongue 32engaging a complemental groove or seat 33 in the base 30 of each of thearms 31. The said lower flange 29 of the bracketl 28 is further providedover each base 30 with longitudinallydisposed adjustment slots 34receiving the securing bolts 35 for holding the bracket rigid when onceadjusted. A' central pivot 36 passes through the bracket 28 and connectswith the templet 26 centrally between the ends of the latter, andcontiguous to its ends the said templet carries the fastening screws 37projecting through vertically disposed play slots 38 formed in thevertical flange of the bracket 28. The inner pattern suz'face 27 of thetempletcon responds to a segment or arc ofthe surface of the roll R' tobe ground. In practical'operation the said surface ing the Eshape ofthis surface 27 the machine may b'e readily adapted for grinding convex'and corrugated surfaces on rolls as well as grinding straight or concavesurfaces.

In connection with the surface 27 of the templet 26 l thereof ahorizontal guide element or roller 39 journaled on a vertical axis 40,and the periphery of said roller, like the surface 27 of the templet ishardened, and in addition to this detail the said periphery,- 41 of theroller is turned to such a radius that at no time during the grindingoperation will there be more than one point of contact with the templet26. It is preferable in carrying out the invention to firmly maintainthe contact of the roller 39 with the surface 27 of the templet throughthe medium of a heavy pressure spring .'42 interposed betweenal1-abutment 43 on the roller end of the slide 12- and a part of thetool carriage 2.

Referring to the general operation of the machine; it is to be notedthat in commencing to grind a roll, the grinding wheel 23 is brought toa position corresponding to the transverse center of the roll. Thepattern supporting bracket 28 is then adjusted longitudinally on itsbase 30 until the central pivot 36 for the templet is in alinement with,or properly speaking', opposite the axis of the guide roller 39. Thenwith the templet 26 adjusted to a position strictly parallel with thelongitudinal axis of the roll R, the grinding wheel will grind aperfectly straight surface on the roll, and in order to ob' tain anydesired degree of concavity or .convexity on the face of the roll beingground, it is only necessary to swivel or turn the templet on its pivot36 to an angle` 1, In a roll grinding machine, a bed, a tool carriagemovable longitudinally of the bed, 4a vertically arranged templet havingan adjustable mounting at one side of the bed,

and a tool holder supporting the grinding wheel and having amembercarrying a guide element held in traveling contact with the patternsurface of the templet.

2. In a roll grinding machine, a stationary bed, a traveling toolcarriage thereon, an offset support arranged at one side of the bed, avertically `arranged templet carriedby said support and having aswiveled mounting thereon, and a tool holder supporting the grindingWheel and having a member` carrying a guide element held in travelingcontact With the pattern surface of the templet.

3. In a roll grinding machine, a stationary bed, a traveling' toolcarriage thereon, a vertically disposed templet arranged in oisetrelation to the bed and having a central pivot support and fasteningmeans, said templet being also provided with an inner pattern surface,and a tool holder longitudinally movable on the tool carriage andcarrying a grinding wheel and a guide kelement,'the latter being.

'held in traveling contact with the pattern surface of the templet,

5. In a roll grinding machine, a stationary bed, a tool carriageslidable longitudinal thereof, a vertically disposed templet having anadjustable and pivotal support beyond one end of the tool carriage, adouble slide supported on and movable longitudinally of the toolcarriage. one of said slide members carrying a grinding Wheel and theother of said members carrying a guide wheel held in traveling contactwith the templet.

6. In a roll grinding machine, a stationary bed, a tool carriageslidable longitudinally thereof, an angled supporting bracket held inoffset relation to one. side of the machine bed beyond one end of thetool carriage, a vertlcally disposed templet having a central pivotalsupport on said bracket and also having fastening means, a follower'slide slidably engaging the carriage and movable longitudinally thereof,said follower slide carrying a guide roller und moved under springpressure toward the templet, a tool holding slide mounted on and movablelongitudinally of the follower slide, said tool holder slide carrying agrinding Wheel, and an adjustable connection between the follower andtool holder slides.

In testimony whereof we hereunto ax our signatures in the presence' oftwo witnesses.

FREDERICK L. BROWN. ISAAC W. SPRINK. Witnesses:

DEB READ STAUFFER, WM. S. LOUCKS.

